Oracle

First, related testing (1) Create a test table Sql> CREATE TABLE TT (ID number); Table created. At this point, the table is not parsed, it is the original data, that is, 8 blocks of data. Sql>select segment_name,segment_type,blocks from

First, view the user index in the system table In Oracle, the system table is created automatically when the database is installed, containing all of the database's data dictionaries, the definitions of stored procedures, packages, functions, and

Today, it is not uncommon for a typical DBA to use session tracking, SQL tracking, and analysis, and I estimate that the usual methods are Sql_trace, 10046 events, and so on. In addition, if we need to track other sessions, what do we need to do?

The v$ view contains information about the data structure that the kernel maintains in memory and can be accessed through a DBA account with SYS privileges. Here is a summary of these v$ views related to recovery: 9.1 V$log Contains the log group

Block Repair is the simplest recovery, which is automatically done by the system during normal operation of the database, and is almost impossible for users to feel. 7.1 Block repair initialization and operation The foreground process calls the

1, from ORACLE download the client's simple package, compressed to any directory on disk, such as E: \utility\oracle\win32 2, add the path to the system environment variable path, and then import the following registry file into the registry

The cause of this story is that there is a classmate in the version 10.2.0.1 (said 9i may also encounter) a host running 198/248/249 (24.9) days after the OCI client spin spin consumption of a large number of CPUs Bug,spin the cause is sltrgatime64 (

Oracle Tablespace Transfer is a new addition to 8i, a fast way to move data between databases, by putting a number The format data file on the library is attached to another database, rather than exporting the data as a DMP file, which In some

As shown in the previous example, the specified object skipped the application although it was canceled, but it is possible that during this time due to the primary database data modification, both ends are not synchronized at this time, if the

1. Parameterized cursors Function: Open the same cursor multiple times, returning a different result set. The parameters of the cursor Declarations section must correspond to the arguments provided in the Open statement (quantity and data type).

In 043 there is the following topic You want a ASM instance to manage the files of your database. To achieve this objective Specify the following parameters in the parameter file of the database: Instance_type = RDBMS Db_name = PROD

Oracle database System management commonly used tools are SVRMGRL., start the Oracle database system, usually using the startup instance without hooking up the database, and so on, and then using the mount to hook up the database; Another method is

According to the results of a recent survey by the Independent Oracle User organization (IOUG), the unexpected disruption of Oracle databases over the past year has been caused by hardware failures rather than by hackers. Ioug (which has 265

oracle| Insert | data | database system/admin: Database table The EMP under the Scott scheme SELECT * from Scott.emp ORDER by EMPNO INSERT into SCOTT. EMP (Empno,hiredate) VALUES (3,to_date (' April-February -2007 ', ' dd-mon-yyyy ')) INSERT into

Oracle Create rollback SEGMENT Syntax: Create [public] ROLLBACK SEGMENT rollback_segment [tablespace tablespace] [STORAGE ([Initi AL integer[k| M]] [NEXT integer[k| M]] [minextents integer] [maxtents {integer| Unlimited}] [OPTIMAL {integer[k| m]| 　　

oracle| Chinese Characters | Problems before doing a system, encountered a problem! Today, I accidentally found the solution to this problem and posted it!!! Problem Description: VARCHAR2 (4000) ABC; Intert into table_name (ABC) VALUES (' Here are 1

oracle| statement Example description Table structure (red primary key) ==> Main Table: Test_part_cost_tab (material number table) Part_no VARCHAR2 (20) Part_name VARCHAR2 (50) From the table: Test_part_cost_dt_tab (material number cost data sheet)

Oracle A trick to modify Oracle user passwords Database version: 9.2.0.5 Sometimes we may not know a user's password, but also need to do some operations with this user, and can not modify the user's password, this time, you can use some tips to

Oracle to the Repository previous topic next topic author Theme x_x Long-term depression ... Registration Date: 2002 OCT From: Fuzhou Number of Posts: 458 How do I extract records in physical order? Rt SELECT * from TabName and select/*+first_rows*

First, the preparatory knowledge before installing Linux 1, Hardware: (1) Host Cpu->cache (L1-L2-L3)-> memory->SSD hard disk-> network-> hard Drive (high to low hardware performance) CPU and Memory: Caching data access, comparisons, sorting,